Sensors; Flow Sensors; Sets With One Pressure Sensor Only; Figure 16: Link Connection - DWT WaCS PWM Serie Instrucciones De Instalación Y Mantenimiento

WARNING: only use cables supplied with the inverter or which are considered as inverter accessories (it is
not a standard cable available on the market).
4.2.2

Sensors

To enable operation, a pressure set requires at least one pressure sensor and optionally one or more flow
sensors.
The pressure sensors are ratiometric 0-5V versions, and in this case one can be connected per inverter, or
4-20mA current sensors, in which case only one can be connected.
The flow sensors are always optional and from 0 to 1 can be connected per inverter.
4.2.2.1

Flow sensors

The flow sensor must be inserted on the delivery manifold on which all pumps are connected, and the
electrical connection can be made on any of the inverters.
The flow sensors can be connected in two ways:

one sensor only

the same number of sensors as inverters
The setting is entered on parameter FI.
Multiple sensors are useful when a specific flow rate is required on each pump, and enhance protection
against dry running operation. To use multiple flow sensors, parameter Fl must be set to multiple sensors
and each flow sensor must be connected to the inverter that controls the pump delivery where the sensor is
located.
4.2.2.2

Sets with one pressure sensor only

Pressure sets can also be set up without a flow sensor. In this case the pump shutdown frequency FZ must
be set as described in 6.5.9.1.
The dry running protection continues to function without the use of a flow sensor.
ENGLISH

Figure 16: Link connection

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